FWIW, a lot of forums encourage people to respond to old threads rather than create new ones on the same subject.
I am with Jason on this; it helps keep information on a topic generally in one place. Is there really an expiration on information and knowledge?
Mary, why do you have a problem with this? As soon as I see a new post in an old thread, I can make a good living by betting people you will jump in within a post or two and bring to everyone's attention just how old the thread is